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PCF2127T/2Y Datasheet(PDF) 11 Page - NXP Semiconductors

Part # PCF2127T/2Y
Description  Accurate RTC with integrated quartz crystal for industrial applications
PDF  100 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCF2127T/2Y Datasheet(HTML) 11 Page - NXP Semiconductors

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PCF2127
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2014. All rights reserved.
Product data sheet
Rev. 8 — 19 December 2014
11 of 100
NXP Semiconductors
PCF2127
Accurate RTC with integrated quartz crystal for industrial applications
8.2.2 Register Control_2
Table 8.
Control_2 - control and status register 2 (address 01h) bit allocation
Bit
7
6
5
4
3
2
1
0
Symbol
MSF
WDTF
TSF2
AF
CDTF
TSIE
AIE
CDTIE
Reset
value
0
000
0000
Table 9.
Control_2 - control and status register 2 (address 01h) bit description
Bit
Symbol
Value
Description
Reference
7
MSF
0
no minute or second interrupt generated
Section 8.13
1
flag set when minute or second interrupt generated;
flag must be cleared to clear interrupt
6
WDTF
0
no watchdog timer interrupt or reset generated
Section 8.13.4
1
flag set when watchdog timer interrupt or reset
generated;
flag cannot be cleared by command (read-only)
5
TSF2
0
no timestamp interrupt generated
Section 8.12.1
1
flag set when TS input is driven to ground;
flag must be cleared to clear interrupt
4
AF
0
no alarm interrupt generated
Section 8.10.6
1
flag set when alarm triggered;
flag must be cleared to clear interrupt
3
CDTF
0
no countdown timer interrupt generated
Section 8.11.4
1
flag set when countdown timer interrupt generated;
flag must be cleared to clear interrupt
2
TSIE
0
no interrupt generated from timestamp flag
Section 8.13.6
1
interrupt generated when timestamp flag set
1
AIE
0
no interrupt generated from the alarm flag
Section 8.13.5
1
interrupt generated when alarm flag set
0
CDTIE
0
no interrupt generated from countdown timer flag
Section 8.13.2
1
interrupt generated when countdown timer flag set



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